Pumping-jack



sawrns PATENT onnion.

LEO H. 'IAFFEE, 01? HASTINGS, MICHIGAN, ASSIGNOR OF ONE HALF TO ABEN E. JOHNSON. 01? HASTINGS, MICHIGAN.

PUMPING-JACK.

- o i ,a...

To all whom it may concern:

l lo it ki'ufz-lvn at I, Ilno II. 'Iarnnn, a citinon of the United States. residing at Hastcounty of Barry, and State of Micht have invented uirtain new and useful. i;iprm'ements in Prunpingdacks, of Which the :lollowing is a specification.

.lhis invention relates to iinproveiuei'its in umping jacks.

The main obj acts 01? this invention are:

First to provide an improved pumping jack zulapted to be mounted :ior support on a pump body which quite compact and oi" coinparatively light weight and easily mounted and connected to the pump rod.

Second, to provide an improved pumping jack in which the moving parts are so sup ported and arrai'iged that the strain thereon is iuininiizrnl.

Third. to provide an improved pumping jack vhich is simple and econoniiml in its parts and one which is very durable in use.

l urther ohiects, and objects relating to definitely appear in l structural details, will 'l'roni the detail-ed description to follow.

I az'couipl sh the objects of my invention by the derices ainl means described in the following specification. The invention is clearly defined and pointed out in the claims.

.ructnre which a pre'lferred embodiment of my invention is clearly illustrated ii. the aceoinpau ying nrawing forming a of this specification, in Whic i:

i. ignite I is a front elevation of a pumping jack embodying the .ifc: tures of my inven' tion. a g iortion of the casing being broken II. is an elevation looking from the ot Fig. I.

III is a detail horizontal section on a line corresponding to line 3-3 of Fig. 1 sh wing d-itails oi. connection. tor the pit-- man to the pump rod.

IV is an enlarged detail partially in vertical section on a line corresponding to line 1 .t of Figs. I, V and VI.

Fig. V is a detail vertical section on a line corresponding to line 5-5of Figs. II, IV and VI.

Fig. VI is a detail horizontal section on a line corresponding to line 6---6 of Figs. II, IV, V and VI.

In the drawing similar reference charactors refer to similar parts throughout the several views, and the sectlonal views are Specification of Letters Patent.

Patented Mar. 23, 1920.

Serial No. 327,544.

taken looking in. the direction of the little arrows at the ends of the section lines.

lhii erring to the drawing, .1. represents the body of a pump mini '2' the pump rod. The details of the pump are not important and I .1 10W the pump her in tor the purpose oi illustrating an applic 'on or adaptation oi my inu iroveiuents.

I provide a casing consisting 01'' a hat outer wall 3 having peripheral flanges -l; at its edges to Wlllcll the inner wall 5 is secured in; the screws 6 and bolts 7. The bolts 7 also secure the supporting hraclaiets 8 which have seats 9 therein for the body of the pump. Uhunping pokes 1O enrbrzwing the (n posite sides of? the pump body are secured to the brackets by means of the bolts 11.. The casing is thus mounted di rec-ti upon and supported by the pump.

The driving shaft 12 is mounted in. a bearing 13 on the Front wall 3 of the eas ing. In the structiux-z illustrated, a driving pulley is provided "for the shaft 12. On the inner end oi? the driving shaft is a driving pinion 15. l

The 'pitman 16 connected to the pump rod 1% by the arm '17, the pitinan being providi-ul with a series oi. holes 18 so that the an 1 may be lot .d as required. for various s and makes of nin1ps. The pitinan has direct connection to the pump rod.

The pitinan ni'm'ided with a rack coacting with the driving pinion comprising a series oi. rack pins 19 n'ovided with rollers '21). (in, the inner ends of the pins 19 is a her 21. which serves the double purpose of a connecting and sumnnzting bar for the pins and an inner guide member enacting with the guide roller .12 on the shaft 12.

An outer yoke guide member 23 is secured. to the pitnian at 2 1 to coact with the roller the yoke and the bar guide member deil'ied, guiifling the movement of the pit man as it is reciprocated by the pinion coacting with the rack. These guide members relieve the pinion and rack of Wear.

The outer wall 3 of the casing is adapted as a guide Way for the guide yoke 23 While the inner Wall 5 is adapted as a guide Way for the pitinan.

A cross guide engages the inner side of the yoke. further supporting the same.

By thus forming and arranging the parts, I secure a pumping jack which is very compact in structure and one which may be made (ill Sill

of comparatively light materials and is at the same time very strong and durable. It is readily adaptable to different makes of pumps, and the parts are simple and economical to produce and assemble.

I have illustrated and described my improvements in an adaptation which I find very satisfactory. I have not attempted to illustrate or describe certain modifications and adaptations as I believe the disclosure made will enable those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a pumping jack, the combination of a casing having flat inner and outer walls adapted as guide ways, a driving shaft mounted on the outer wall, a driving pinion on said shaft, a pitman having a series of rack pins on its outer side provided with rollers constituting a rack coacting with said pinion, an inner bar-like guide member mounted on the outer ends of said rack pins, a guide yoke mounted on said pitman to embrace said shaft, a roller on said shaft coacting with said guide yoke and said inner guide member, the outer wall of the casing constituting a guide way for said guide yoke and the inner wall a guide way for said pitman, and a transversely disposed supporting bar mounted in said casing to engage the inner side of said guide yoke.

2. In a pumping jack, the combination oi a casing, a driving shaftga driving pinion on said shaft, a pitman having a series of rack pins on itsouter side provided vith rollers constituting a rack coasting with said pinion, an inner bar-like guide member mounted on the outer ends of said rack pins, a guide yoke mounted on said pit-man to embrace said shaft, a roller on said shaft coacting with said guide yoke and said inner guide member, and a transversely disposed supporting bar mounted in said casing to engage the inner side of said guide yoke.

3. In a pumping jack, the combination of a casing having flat inner and outer walls adapted as guide ways, a driving shaft mounted on the outer wall, a driving pinion on said shaft, a pitman having a series of rack pins on its outer side provided with rollers constituting a rack coaoting with said pinion, an inner bar-like guide member mounted on the outer ends of said rack pins, a guide yoke mounted on said pitman to embrace said shaft, a roller on said shaft rollers constituting a rack coacting with said pinion, an inner bar-like guide menuur mounted on the on er ends of said ruck pins, a guide yoke mounted on said pitman to embrace said shaft, a roller on said shaft toacting with said guide yoke and said inner guide member, the outer wall of the casing constituting a guide way ror said guide yoke and a transversely disposed supporting bar mounted in said casing to support the inner;

side of said guide yoke.

5. In av pumping ack, the combination of a casing adapted to be mounted on the pump body and having iiat inner and outer walls adapted as guide ways, a driving sha ii; mounted on the outer *all, a driving pinion on said shaft. a pitman, a rack on said pitman coasting with said pinion, an inner ba 1'- like guide member on said rack, av guide yoke mounted on said pitman, a roller on said shaft coucting with said guide yoke and said inner guide member, the outer wa ll of the casing constituting a guide. way for said guide yoke and the inner wall a guide way tor said pitman, and a transversely dis posed supporting bar to engage the inner side of said guide yoke.

(5. In a pumping jack, the combination oia casing adapted to be mounted on the pump body. a driving shaft mounted on the out r wall, a driving pinion on said shaft, a pitman, 'a rack on said pitman, an inner barlike guide member on said rack, a guide yoke mounted on said pitman, a roller on d shaft coacting with said guide yoke and said inner guide member, the outer wall of the casing constituting a guide way for said guide yoke, and a transwuscly disposed supporting bar to engage the inner side of said guide yoke.

In witness whereof I have hereunto set my hand and seal in the presence of two witnesses LEO H. TAFFEE. 1,. s] lVitnesses ANDREW DOOLEY,

Swas A. F. ANDERSON.

lllfi Ill) 

